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SHEA &HARVEY. Protecting Furnaces.

No. 79,866.. l I Patented July 14, 1868.

-N.PETERS, FHDTO-LITHOGRAPNER, WASHINGTON. D. C.

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WILLIAM SHEA AND L. 1). HABVEK'GF HARVEY, MICHIGAN.

Letters Patent No. 79,866, dated July 14, 1868.

IMPROVEMENT IN FURNAGES FOR MELTING METALS.

TOALL WHOM IT MAY CONCERN:

convenient.

Beit known that we, WILLIAM SHEA and L.'D. HARVEY, of Harvey, in thecounty of Marquette, and in the State of Michigan, have invented certainnew and useful Improvements in Furnaces; ancl do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing made to the accompanying drawings, and to the letters of referencemarked thereon.

In the annexed drawings, forming part of this specification, Arepresents the brick-work of a furnace; B, the fore-bay; G, the hearth;D D, the tuyere-arches. Above these tuyere-arches are twoprotecting-plates, and below is one, marked, respectively, E, F, and G.These plates are made of cast iron, two inches thick, four feet long,and twenty or twenty-two inches wide, as the furnace may require, with athreequarter inch pipe inside of the same, bent as represented inFigures 2 and 3. The pipes ineachof the plates have two openings, one,H, being the feed-pipe that supplies the plates with cold water, and.should have a stop.-cock in the arch at some convenient place, toregulate the supply of water. The other opening, I, is a dischargepipe,leading to any point to get rid of the waste water.

The plates E, F, and G are placed in the third course of brick, upright;G, below the, tuyere-arch, and

extended to protect the jambs; E and F above the tuyere, at eonvenientdistancc-from each other, to cool-the brick around the crucible. Thereare also two half-circle plates, J, With the same arrangement of pipesunder the hearth. The pipes, when laid in brick-work, can be bent, so asto come at any point that would be most The advantages of thiscombination ofplates antl pipes arc- V First, in making the plates inpieces, three for each t-uyere-arch, the pipes will be short and not soliable to be stopped up with the water scalding. V

Second, in case one plate should get stepped up, the rcst,of the plateswill keep the hearth from burning out, which can be done by using morewater in them, as there is a stop-cock on each feed-pipe.

Third, by using these plates one hearth can be made to last three timesas long as one without them. Fourth, by using these plates the cruciblecan at once be built and kept at the size of four or five feet indiameter, when in ordinary cases it is first built with a diameter ofthirty to forty inches, an(l then burnt to the larger size before itmakes iron fastand economical. o Having thus fully describedourinvention, and the advantages accruing therefrom, what we claim asnew, and rlesire to secure by Letters Patent, isl The putting of pipesinto cast-iron plates, substantially as and for the purposes above setforth. In testimony that we claim the foregoing, we have hereunto setour ll1tl1I.lS, tlJlS 16th day of November, 1867 WILLIAM SHEA,

L. D. HARVEY.

Witnesses: r

11mm: D. Surrr 1, J. M. WILKIssox.

